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USER’S MANUAL
RS-232/422/485
Universal PCI/PCI Express
Industrial Multiport Serial Cards
Ver. 1.0, Feb. 2007
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INDEX
Chapter 1
Introduction........................................................................................
Overview................................................................................................................................1-2
Package Checklist.................................................................................................................. 1-2
Product Features.. ................................................................................................................. 1-3
Product Specifications............................................................................................................ 1-4
Chapter 2
Chapter 3
Hardware Installation...........................................................................
Hardware Installation............................................................................................................. 2-1
Pin Assignment ........ ............................................................................................................ 2-2
Software Installation ............................................................................
Windows 2000/XP/2003 (32bit) ....................................................................................... 3-1
Windows 2000/XP/2003 (32bit WHQL) ........................................................................... 3-2
Windows XP/2003 (64bit) .................................................................................................. 3-3
Windows Vista (32bit) ......................................................................................................... 3-4
Linux. ................................................................................................................................. 3-5
Chapter 4
Chapter 5
Trouble Shooting .................................................................................
Appendix.... .... .... ...............................................................................
Contract Information......................................................................................................... 5-1
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1. Introduction
SUNIX Serial Communication Boards family provides an array of PCI Express, PCI, PCI-104 and PC/104 interfaces to meet
your serial port expansion needs. Multi-port Serial Communication Board comes in the selection of 2.4.8 ports in choice
of RS-232, RS-422/485 or 3-in-1 combo with DB9 or DB25 serial connectors and compatible with all major operating
system for industrial applications.
The following topics covered in this chapter:
‹
‹
‹
‹
Overview
Package Checklist
Product Features
Product Specifications
1-1. Overview
Thanks for purchasing Universal PCI / PCI-E Industrial Multi-Port Communication Card. The Multi-port serial card
equips with 2, 4, or 8 independent DB9 or DB25 RS-232/422/485 high-speed serial ports which accessed through DB-9
or DB-25 male connectors for industrial communication and automation applications. Each serial port has built-in 64byte
hardware FIFO, on-chip hardware flow control, provides baudrate speed up to 921Kb/Sec and also compatible with the
popular 16C750/16C550/16C450 UART controller.
1-2. Package Checklist
Please check if the following items are present and in good condition upon opening your package. Contract your vendor if
any item is damaged or missing.
1. Hardware:
Serial Communication Board : Communication Board × 1
Cable : (Depend on what product you bought)
2 ports PCI series: DB44 Female to 2 ports DB9/25 Male Cable × 1
4 ports PCI series: DB44 Female to 4 ports DB9/25 Male Cable × 1
8 ports PCI series: Mini SCSI 68pin to DB9 Male Cable × 1
Bracket : Standard Bracket × 1
Low Profile Bracket × 1
2. CD Driver
3. Quick Installation Guide
4. User's Manual
(This document)
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1-3. Product Features
New Design of Matrix UART controller
Matrix is a highly integrated multi-port UART controller that includes all of its functions into a single chip. In addition to
those functions provided by a standard 16C750 UART chip, it also equips lots of advanced features that make the serial
communication much more reliable and easy to use.
With the large buffer and special designed flow-control circuit inside the chip, it could provide the transfer speed up to
921Kbps for each port. Highly integration makes the response time much fast and consumes little power dissipation even
when it is worked at full speed. Those features together make it suitable for those applications that require low latency,
real-time control, high reliability and low-power environments.
The Matrix is ideal for POS system, industrial automation, data collection and any other applications that require serial
connection.
Sunix Proprietary AHDC/CS for Automatic RS-485 Direction Control
In the early days, RS-485 transmission required manual switching of the direction of the line driver. Switching manually is
prone to error and is not an efficient way. In order to solve such problem, Sunix has developed a special technique call
AHDC/CS for RS-485 transmission to provide a precise data direction control automatically. Unlike ordinary RS-485
direction control, AHDC/CS also makes its best to avoid possible collisions which provides even more reliable
communication.
AHDC/CS works seamlessly with transmit and receive unit of Matrix UART Controller and control the direction on-the-fly,
hence it won’t incur any additional overhead and latency.
Automatic RS-422/RS-485 Detection and Switching
SUNIX developed a unique technology “Auto Detect and Switching RS-422 / 485”, which can automatically detect the state
of RS-422 full duplex or RS-485 half duplex and control the data transmitting and receiving wires at the same port
without any jumper settings. This design gives users the convenience to change the communication mode setting without
any system shut downs.
Built-in Surge protection and Isolation (Option for SI version)
Surges are high amplitude electrical pulses lasting only several millionths of a second in duration. They can be caused by
heavy-duty equipment, power lines, short circuits, or large motors. A surge suppressor has the ability to effectively
absorb the high energy in an extremely short period of time, preventing the connected devices from damage. Sunix Martix
Multi-port Serial Card (SI version) has built-in 400W surge protection on all of the signals that meets IEC61000-4-5
standards.
Isolation eliminates the direct galvanic connection between digital system and output drivers/receivers. Optocouplers is
used for data isolation and magnetic transformers for power source isolation.
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Galvanic isolation removes the ground-loop currents from data lines; hence, the impressed noise voltage that affects the
signal also is eliminated. Common-mode noise can be removed completely and many forms of radiated noise can be
reduced to negligible limits using this technique.
It is highly recommended for use in high-noise environments.
1.10. Product Specifications
Universal PCI Interface
z
Function
Type
Universal PCI Industrial Multi-Port Serial Card
RS-232, 422 Full-Duplex, RS-485 Half-Duplex
RS-232, RS-422, RS-485 1 Driver
Bus Transceivers
Drivers per Line
Receivers per Line
RS-232 1 , RS-422 10 , RS-485 32 Receivers
z
Hardware
IC
Matrix
Controller
16C750 compatible UART
64-bit & 32-bit PCI Bus
3.3V & 5V Connector Key
2, 4 or 8 ports
Bus Interface
Number of Ports
Bracket
Standard 121 mm, Low Profile79.2 mm
z
Communication
IRQ & I/O address
FIFO
Assigned by BIOS / O.S.
64 byte hardware FIFO
75bps ~ 921.6 Kbps
5,6,7,8
Baud rate
Data bit
Stop bit
1,1.5,2
Parity
even, odd, none, mark, space
none, Software, Hardware
Flow Control
15KV ESD Surge Protection (for RS-232)
400W Surge Protection (for RS-422/485)
2.5KV Isolation Protection (for RS-422/485)
232 : TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
422 : TxD+, TxD-, RxD+, RxD-, GND
485 : 4 Wire - TxD+, TxD-, RxD+, RxD-, GND
2 Wire - Data+, Data-, GND
Protection
Signal
z
Driver support
Microsoft Windows 2000/XP/2003/VISTA
DOS, Linux 2.0.x / 2.2.x / 2.4.x / 2.6.x
Driver Support
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z
Dimensions
Dimensions (W × D)
Regulatory Approvals
125 x 63 mm (for RS-232 only and RS-422/485 only)
135 x 63 mm (for 3-in-1 only)
z
Regulatory Approvals
PCI Express Interface
CE, FCC
z
Function
Type
PCI Express Industrial Multi-Port Serial Card
Hand-Shaking
Mode of Operation
Bus Transceivers
Drivers per Line
Receivers per Line
RS-232, 422 Full-Duplex, RS-485 Half-Duplex
RS-232, RS-422, RS-485 1 Driver
RS-232 1 , RS-422 10 , RS-485 32 Receivers
z
Hardware
IC
Matrix
Controller
16C750 compatible UART
PCI Express Bus Spec. Revision 1.0a
2, 4 or 8 ports
Bus Interface
Number of Ports
Bracket
Standard 121 mm, Low Profile79.2 mm
z
Communication
IRQ & I/O address
FIFO
Assigned by BIOS / O.S.
64 byte hardware FIFO
75bps ~ 921.6 Kbps
5,6,7,8
Baud rate
Data bit
Stop bit
1,1.5,2
Parity
even, odd, none, mark, space
none, Software, Hardware
Flow Control
15KV ESD Surge Protection (for RS-232)
400W Surge Protection (for RS-422/485)
Protection
Signal
232 : TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
422 : TxD+, TxD-, RxD+, RxD-, GND
485 : 4 Wire - TxD+, TxD-, RxD+, RxD-, GND
2 Wire - Data+, Data-, GND
z
Driver support
Driver Support
Dimensions
Dimensions (W × D)
Regulatory Approvals
Microsoft Windows 2000/XP/2003/VISTA
DOS, Linux 2.0.x / 2.2.x / 2.4.x / 2.6.x
z
125 x 63 mm (for RS-232 only)
135 x 63 mm (for 3-in-1 only)
z
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Regulatory Approvals
CE, FCC
2. Hardware Installation
This chapter includes information about hardware installation for RS-232 Universal PCI Multi-Port Communication Board.
The following topics are covered:
‹
‹
Hardware Installation
Pin Assignments
2-1. Hardware Installation
The hardware installation of PCI / PCI-E serial boards is easy to carry out. Before inserting the card into the PCI / PCI-E bus,
please follow the detailed steps given below to install the PCI / PCI-E serial board in your computer.
Safety First
To avoid damaging your system and boards, make sure your PC’s power is turned off
before installing PCI/PCI-E card.
Step 1: Turn your PC’s power off, and shut off the power to any peripheral.
Step 2: Remove the power plug from the plug socket.
Step 3: Remove the cover from the computer case.
Step 4: If fitted. Remove the metal cover plate on the rear of a free PCI slot.
Step 5: Insert Universal PCI / PCI-E Multi-Port Communication Board into the free PCI / PCI-E slot and screw it firmly on
the bracket side.
Step 6: Place the cover back onto the computer.
Step 7: Insert the plug into the plug socket.
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2-2. Pin Assignment
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3. Software Installation
After installing the RS-232/42/485 Universal PCI / PCI Express Multi-Port Communication Board in your system
successfully, please follow the step by step software installation guide to confirm how to install appropriate driver and
configure the serial port settings.
The driver for PCI / PCI-E serial board supports various operating systems, and you can select your requirement in the
following chapter:
The following topics covered in this chapter:
‹
‹
‹
‹
‹
Windows 2000
Windows XP (32 / 64-bit)
Windows Server 2003 (32 / 64-bit)
VISTA (32-bit)
Linux
3-1. Windows 2000/XP/2003 (32-bit)
‹
Installing Driver
On booting up, system will detect present of the PCI Serial Board and prompt for driver installation wizard, and show the
picture.
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(1) Please insert the driver CD in your CD/DVD-ROM drive.
(2) Please click “Next” to continue.
(3) Please choose “Search for a suitable driver for my device (recommended) “option, and click “Next” again to continue.
(4) Please choose the 2 items as bellow, then click “Next” to continue.
(5) Please click “ Browser ” to choose driver folder.
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(6) Please choose the CD/DVD-ROM drive, and choose the path “Windows\2K&XP&2003&Vista_32bit”, and click “Open” to
continue.
(7) Please click “OK” to continue.
(8) Please click “Next” to continue.
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(9) Please click “Yes” to continue.
(10) Please click “Finish” to continue.
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(11) Please click “Next” to continue.
(12) Please choose “Search for a suitable driver for my device (recommended) “option, and click “Next” again to continue.
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(13) Please choose the 2 items as below, then click “Next” to continues.
(14) Please click “OK” to continue.
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(15) Please click “Next” to continue.
(16) Please click “Finish” to continue.
Note. Please return step11~step16 to install.
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‹
Configure the Serial Port Settings
1. Please launch the “Device Manager”
2. Right click the “SUNIX Matrix Serial port XXX (COMXXX)” item from the “Ports (COM & LPT)” sub-tree and click
“Properties”.
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3. Click “Port Settings” tab page and click “Advanced” for advanced settings.
4. Click “Defaults” button for restoring default advanced settings.
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5. Check/Un-check the “Enable 64 Byte FIFO buffers” checkbox to enable / disable the hardware FIFO buffering
feature or you can select the size of FIFO if “Use FIFO buffers control” is enabled.
6. Re-map the COM port number by select a free COM port number from the “COM Port Number” combo box. The (in
use) means this COM port number is used by another COM port.
7. Click “OK” to save your settings, and repeat above steps for each serial port.
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‹
Uninstalling Device
1. Please launch the Device Manager, and find the SUNIX Matrix Serial Port XXX (COMXXX).
2. Right click the “SUNIX Matrix Serial port XXX (COMXXX)” item from the “Ports (COM & LPT)” sub-tree and click
“Uninstall”.
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3. Please click “OK” to remove driver, and repeat step2~step3 to remove other ports.
3-2. Windows XP (32 / 64-bit)
The following procedure is for installing PCI / PCI-E serial board driver under 32 / 64- bit hardware system under
Windows XP. This driver is certified by Microsoft.
‹
Installing Driver
On booting up, system will detect present of the PCI / PCI-E Serial Board and prompt for driver installation wizard,
and show the picture.
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(1) Please choose “No, not this time” option, and click “Next” to continue.
(2) Please insert the driver CD in your CD/DVD ROM drive, and choose “Install from a list or specific location
(Advanced)” option, and click “Next” to continue..
(3) Please choose “Include this location in the search:” option, and click “Browser” to choose driver folder.
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(4) Please choose the CD-ROM drive, and find the driver folder , and click “OK” to continue.
P.S.1. XP 32bit, please use the folder \Windows\2K&XP&2003&Vista_32bit
P.S.2. XP 64bit, please use the folder \Windows\XP&2003_64bit
(5) Please click “Next” to continue.
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(6) Please click “Continue Anyway” to continue.
(7) Please click “Finish” to continue.
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(8) Please choose “Install from a list or specific location (Advanced)” option, and click “Next” to continue.
(9) Please click “Next” to continue.
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(10) Please click “Continue Anyway” to continue.
(11) Please click “Finish” to continue.
Note. Please repeat step8~step11 to install.
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‹
Configure the Serial Port Settings
1. Please launch the “Device Manager” from Start Æ Control Panel Æ System
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2. Right click the “SUNIX Matrix Serial port XXX (COMXXX)” item from the “Ports (COM & LPT)” sub-tree and click
“Properties”.
3. Click “Port Settings” tab page and click “Advanced” for advanced settings.
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4. Click “Defaults” button for restoring default advanced settings.
5. Check/Un-check the “Enable 64 Byte FIFO buffers” checkbox to enable / disable the hardware FIFO buffering
feature or you can select the size of FIFO if “Use FIFO buffers control” is enabled.
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6. Re-map the COM port number by select a free COM port number from the “COM Port Number” combo box. The (in
use) means this COM port number is used by another COM port.
7. Click “OK” to save your settings, and repeat above steps for each serial port.
‹
Uninstalling Device
1. Please launch the Device Manager, and find the SUNIX Matrix Serial Port XXX (COMXXX).
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2. Right click the “SUNIX Matrix Serial port XXX (COMXXX)” item from the “Ports (COM & LPT)” sub-tree and click
“Uninstall”.
3. Please click “OK” to remove driver, and repeat step2~step3 to remove other ports.
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3.3. Windows Server 2003 (32 / 64-bit)
The following procedure is for installing PCI / PCI-E serial board driver under 32 and 64- bit operation system
Server 2003 including 32bit driver and both INTEL and AMD 64-bit hardware systems.
INTEL:
Windows Server 2003 for 64-Bit Itanium-based Systems (IA64)
AMD:
Windows Server 2003 for 64-Bit Extended Systems (AMD64)
‹ Installing Driver
On booting up, system will detect present of the PCI / PCI-E Serial Board and prompt for driver installation wizard.
Please insert the driver CD bound with PCI / PCI-E serial board in your CD/DVD ROM drive.
(1) Please select “No, not this time” and click “Next” to continue in Found New Hardware Wizard window.
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(2) Please select “Install from a list or specific location (Advance)”, and Click “Next” to continue.
(3) Please choose the 2 items as below, and click “Browser” to continue.
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(4) Please choose CD driver folder to install multi-port card driver, and click “OK” to continue.
P.S.1. 32bit, please use the folder \Windows\2K&XP&2003&Vista_32bit
P.S.2. 64bit, please use the folder \Windows\XP&2003_64bit
(5) Please click “Next” to continue
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(6) Please click “Continue Anyway” to continue install.
(7) Please click “Finish” to continue.
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(8) Please choose “No, no this time” option, and click “Next” to continue.
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(9) Please choose “Install from a list or specific location (Advance)” option, and click “Next” to continue.
(10) Please click “Next” to continue.
(11) Please click “Continue Anyway” to continue.
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(12) Please click “Finish” to continue.
Note. Please repeat step8~step12 to install.
‹
Configure the Serial Port Settings
1. Please launch the “Device Manager”
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2. Right click the “SUNIX Matrix Serial Port (COMXXX)” item from the “Ports (COM & LPT)” sub-tree and click
“Properties”.
3. Click “Port Settings” tab page and click “Advanced” for advanced settings.
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4. Click “Defaults” button for restoring default advanced settings.
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5. Check/Un-check the “Enable 64 Byte FIFO buffers” checkbox to enable / disable the hardware FIFO buffering
feature or you can select the size of FIFO if “Use FIFO buffers control” is enabled.
6. Re-map the COM port number by select a free COM port number from the “COM Port Number” combo box. The (in
use) means this COM port number is used by another COM port.
7. Click “OK” to save your settings, and repeat above steps for each serial port.
3-22
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‹
Uninstalling Device
1. Please launch the “Device Manager”
2. Expand the “Ports (COM & LPT)” sub-tree and right-click the mouse on “SUNIX Matrix Serial Port (COMXXX)” item,
and select “Uninstall”.
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3. Please click “OK” to remove driver, and repeat step2~step3 to remove other ports.
3.4. Vista (32-bit)
The following procedure is for installing PCI / PCI-E serial board driver under 32 -bit operation system Vista including
32bit driver.
‹Installing Driver
On booting up, system will detect present of the PCI / PCI-E Serial Board and prompt for driver installation wizard.
Please insert the driver CD bound with PCI / PCI-E serial board in your CD/DVD-ROM drive.
(1) Please click “Locate and install driver software (recommended) ” to continue in Found New Hardware Wizard
window.
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(2) Please click “Don’t search online” to continue.
(3) Please click “I don’t have the disc. Show me other options.” to continue.
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(4) Please click “Browse my computer for drivers software (advanced)” to continue.
(5) Please click “Browse” to choose driver folder.
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(6) Please choose the CD/DVD-ROM drive, and select the driver folder “\Windows\2K&XP&2003&Vista_32bit” , and
click “OK” to continue install.
(7) Please click “Next” to continue.
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(8) Please click “Install this driver software anyway” to continue.
(9) Please click “Close” to continue.
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(10) Please click “Don’t search online” to continue.
(11) Please click “I don’t have the disc. Show me other options” to continue.
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(12) Please click “Browse my computer for driver software (advanced)” to continue.
(13) Please click “Next” to continue.
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(14) Please click “Install this driver software anyway” to continue.
(15) Please click “Close” to continue.
Note. Please repeat step10~step15 to install.
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‹
Configure the Serial Port Settings
1. Please launch the “Control Panel” , and launch the “Device Manager”
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2. Right click the “SUNIX Matrix Serial Port XXX (COMXXX)” item from the “Ports (COM & LPT)” sub-tree and click
“Properties”.
3. Click “Port Settings” tab page and click “Advanced” for advanced settings.
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4. Click “Defaults” button for restoring default advanced settings.
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5. Check/Un-check the “Enable 64 Byte FIFO buffers” checkbox to enable / disable the hardware FIFO buffering
feature or you can select the size of FIFO if “Use FIFO buffers control” is enabled.
6. Re-map the COM port number by select a free COM port number from the “COM Port Number” combo box. The (in
use) means this COM port number is used by another COM port.
7. Click “OK” to save your settings, and repeat above steps for each serial port.
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Uninstalling Device
1. Please launch the “Device Manager”
2. Expand the “Ports (COM & LPT)” sub-tree and right-click the mouse on “SUNIX Matrix Serial Port (COMXXX)” item,
and select “Uninstall”.
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3. Please choose “Delete the driver software for this device”, and click “OK” to remove driver, and repeat step2~step3
to remove other ports.
3.5. Linux
The drivers for Linux support both kernel 2.4.x and 2.6.x along with various Linux distributions. Separate packages
are used for different version of kernels. Driver with suffix “2.4_Vx.xx” supports kernel 2.4.x, and driver with suffix
“2.6_Vx.xx” supports kernel 2.6.x.
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The installation steps described below is showed as a general case. More detail description about installation could
be found on the readme file along with the driver package.
3.5.1. Driver Installation
To install the driver, follow each steps showed below. Package for kernel 2.6.x is used as example in the following
steps, version 2.4.x works in the same way. Check the readme file for differences.
1. Please create a directory under root directory, e.g /temp,
do command as below.
# cd /
# mkdir temp
2. Select a driver package according to kernel version and copy it into /temp
directory, then extract and install, do commands as below.
# cp matrix_2.6_Vx.xx.tgz /temp
# cd /temp
# tar xvfz matrix_2.6_Vx.xx.tgz
# cd /temp/matrix_2.6
# make clean ; make install
3. To load driver module, please do command as below.
# modprobe sunix_matrix
or
# insmod /temp/matrix_2.6/driver/sunix_matrix.ko
4. To check if driver is loaded, do as below.
# lsmod | grep sunix_matrix
5. If want to remove driver, do command as below.
# rmmod sunix_matrix
6. Each serial port has its file node whose name will be "ttySMX?". To create device nodes do commands as below.
# cd /temp/matrix_2.6/smxmknod
# ./smxmknod
This will create device nodes in /dev
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If there are more than two boards installed, device nameing convention table as below.
Board Number
1st board
Device Name
ttySMX0 ~ ttySMX7
ttySMX8 ~ ttySMX15
ttySMX16 ~ ttySMX23
ttySMX24 ~ ttySMX31
2nd board
3rd board
4th board
7. To dump information for those serial ports, do command as below
# smxdump
This will show the info about those serial ports, the result should be like this
================ Found 6 SUNIX port, list informations below ===============
ttySMX0 --
RS-232 (bus:2 device: 1) , base address = a000, irq = 169
ttySMX1 --
RS-232 (bus:2 device: 1) , base address = a008, irq = 169
ttySMX2 --
RS-232 (bus:2 device: 1) , base address = a010, irq = 169
ttySMX3 --
RS-232 (bus:2 device: 1) , base address = a018, irq = 169
ttySMX8 --
RS-422/485 (bus:2 device: 2) , base address = a800, irq = 177
ttySMX9 --
RS-422/485 (bus:2 device: 2) , base address = a808, irq = 177
======================================================================
8. To build softlink for device node, do as below
# snxlink
9. Use snxterm to test those installed serial ports.
# snxterm
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4. Troubleshooting
This chapter shows some problems that user came with usually. Also you can check it if the PCI / PCI-E serial board
can not work properly in your system after following hardware and software installation steps.
‹
Troubleshooting
1. System fails to find the PCI / PCI-E serial board or COM port.
A: It may cause by following issue:
a. The board is not properly plugged into the PCI / PCI-E slot.
b. Please clean the golden finger.
c. The PCI / PCI-E slot is defective. Please try other slots until you find one that works.
d. The mainboard does not have an available IRQ for the PCI / PCI-E serial board. Enter the PC.s BIOS and make sure
an IRQ setting is available in the PCI/PnP settings.
e. The board itself might be defective. You can try another mainboard testing this board working or not.
2. There is a blue screen when I entry operation system.
A: The possible reason is an IRQ or I/O address conflict with other PCI / PCI-E bus adapters, such as LAN or serial
boards, or with the system BIOS. Refer to the corresponding problem in the previous FAQ for solutions.
3. There are some exclamation marks in device manager and serial ports can not work properly.
A: It caused by the wrong driver installing or hardware settings. Please turn off your computer firtly and re-install
hardware and software.
4. The PCI / PCI-E serial board cannot be detected by the attached driver while installing the driver.
A: It may cause by following issue:
a. The board is not installed. Please install the board in an empty PCI / PCI-E slot.
b. The board is not properly plugged into the system’s PCI / PCI-E slot. If that is the case, re-plug the board in a
32-bit PCI / PCI-E slot. It may also be the case that the PCI PCI-E slot is defective. In this case, try other PCI /
PCI-E slots until you find one that works.
5. FIFO overrun or Buffer overrun occurs during transmission
A: This is due to the buffer size is too large such that the CPU can not process those data in time. The problem usually
happens when running at very high baudrate speed. Try lowering the buffer size one step at a time until overrun no
longer occurs or enable the flow control during transmission.
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5. Appendix
This chapter shows PCI / PCI-E serial board core technologies and shows you how to contact with us for information
about this and other products.
In this appendix, we cover the following topics.
‹
Contract Information
Customer satisfaction is our number one concern, and to ensure that customers receive the full benefit of our
products, SUNIX services has been set up to provide technical support, driver updates, product information, and
user’s manual updates.
The following services are provided
E-mail for technical support……………………………………..................................... [email protected]
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